function broadcast(componentName, eventName, params) {
  this.$children.forEach(child => {
    var name = child.$options.name
    if ((isComponent(componentName, name) || child.$options.refresh)) {
      child.$emit.apply(child, [eventName].concat(params))
    } else {
      broadcast.apply(child, [componentName, eventName].concat([params]))
    }
  })
}
function isComponent(componentName, name) {
  if (componentName instanceof RegExp) {
    return componentName.test(name)
  } else if (typeof componentName === 'string') {
    return name === componentName
  } else if (componentName instanceof Array) {
    return componentName.includes(name)
  } else {
    return false
  }
}
export default {
  methods: {
    dispatch(componentName, eventName, params) {
      var parent = this.$parent || this.$root
      var name = parent.$options.name
      while (parent && (!name || !isComponent(componentName, name))) {
        parent = parent.$parent

        if (parent) {
          name = parent.$options.name
        }
      }
      if (parent) {
        parent.$emit.apply(parent, [eventName].concat(params))
      }
    },
    broadcast(componentName, eventName, params) {
      broadcast.call(this, componentName, eventName, params)
    }
  }
}
